copybig

Decide if large objects should be copied

internal

Fast categorization of items based on external code data identified by
regular expressions. A typical use case considers patient with medically coded
data, such as codes from the International Classification of Diseases ('ICD') or
the Anatomic Therapeutic Chemical ('ATC') classification system.
Functions of the package relies on a triad of objects: (1) case data with unit
id:s and possible dates of interest; (2) external code data for corresponding
units in (1) and with optional dates of interest and; (3) a classification
scheme ('classcodes' object) with regular expressions to identify and
categorize relevant codes from (2).
It is easy to introduce new classification schemes ('classcodes' objects) or
to use default schemes included in the package. Use cases includes patient
categorization based on 'comorbidity indices' such as 'Charlson', 'Elixhauser',
'RxRisk V', or the 'comorbidity-polypharmacy' score (CPS), as well as adverse
events after hip and knee replacement surgery.

Erik Bulow

coder

Deterministic Categorization of Items Based on External Code
Data

Emely C Zabore

David Robinson

copybig function

<dl><dt>x</dt>
<dd>object (potentially of large size)</dd>
<dt>.copy</dt>
<dd>Should the object be copied internally by <code><a href="https://Rdatatable.gitlab.io/data.table/reference/copy.html">data.table::copy()</a></code>?
<code>NA</code> (by default) means that objects smaller than 1 GB are copied.
If the size is larger, the argument must be set explicitly. Set <code>TRUE</code>
to make copies regardless of object size. This is recommended if enough RAM
is available. If set to <code>FALSE</code>, calculations might be carried out
but the object will be changed by reference.
IMPORTANT! This might lead to undesired consequences and should only be used
if absolutely necessary!</dd></dl>

Arguments

Decide if large objects should be copied — copybig

<dl>

<dt>x</dt>
<dd>object (potentially of large size)</dd>


<dt>.copy</dt>
<dd>Should the object be copied internally by <code><a href='https://Rdatatable.gitlab.io/data.table/reference/copy.html'>data.table::copy()</a></code>?
<code>NA</code> (by default) means that objects smaller than 1 GB are copied.
If the size is larger, the argument must be set explicitly. Set <code>TRUE</code>
to make copies regardless of object size. This is recommended if enough RAM
is available. If set to <code>FALSE</code>, calculations might be carried out
but the object will be changed by reference.
IMPORTANT! This might lead to undesired consequences and should only be used
if absolutely necessary!</dd>

</dl>

copybig: Decide if large objects should be copied

Description

Usage

Value

Arguments